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ISL6535CBZ Datasheet(PDF) 5 Page - Intersil Corporation |
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ISL6535CBZ Datasheet(HTML) 5 Page - Intersil Corporation |
5 / 14 page 5 FN9255.0 January 17, 2006 Functional Pin Description (SOIC/QFN) RT (Pin 1/14) This pin provides oscillator switching frequency adjustment. By placing a resistor (RRT) from this pin to GND, the switching frequency is set from between 200kHz and 1.5MHz according to the following equation: . Alternately ISL6535’s switching frequency can be lowered from 200kHz to 50kHz by connecting the RT pin with a resistor to VCC according to the following equation: REFERENCE Reference Voltage TJ = 0°C to 70°C 0.591 0.597 0.603 V TJ = -40°C to 85°C 0.588 0.597 0.606 V System Accuracy TJ = 0°C to 70°C -1.0 - 1.0 % TJ = -40°C to 85°C -1.5 - 1.5 % REFIN Current Source (QFN Only) -4 -6 -8 µA REFIN Threshold (QFN Only) 2.10 - 3.50 V REFIN Offset (QFN Only) -3 - 3 mV GATE DRIVERS Upper Drive Source Current IU_SOURCE VBOOT - VPHASE = 12V, 3nF Load - GBD - 1.25 - A Upper Drive Source Impedance RU_SOURCE 90mA Source Current - 2.0 - Ω Upper Drive Sink Current IU_SINK VBOOT - VPHASE = 12V, 3nF Load- GBD - 2 - A Upper Drive Sink Impedance RU_SINK 90mA Source Current - 1.3 - Ω Lower Drive Source Current IL_SOURCE VPVCC = 12V, 3nF Load - GBD - 2 - A Lower Drive Source Impedance RL_SOURCE 90mA Source Current - 1.3 - Ω Lower Drive Sink Current IL_SINK VPVCC = 12V, 3nF Load - GBD - 3 - A Lower Drive Sink Impedance RL_SINK 90mA Source Current - 0.94 - Ω SSDONE (QFN ONLY) SSDONE Low Output Voltage ISSDONE = 2mA 0.30 V Electrical Specifications Recommended Operating Conditions, unless otherwise noted specifications in bold are valid for process, temperature, and line operating conditions. (Continued) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Typical Performance Curves FIGURE 1. RRT RESISTANCE vs FREQUENCY FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY 10 100 1000 SWITCHING FREQUENCY (kHz) 10 100 1000 RRT PULLUP TO +12V RRT PULLDOWN TO GND 100 200 300 400 500 600 700 800 900 1000 80 70 60 50 40 30 20 10 0 SWITCHING FREQUENCY (kHz) CGATE = 1000pF CGATE = 3300pF CGATE = 10pF R RT kΩ [] 6500 F s kHz [] 200 kHz [] – ------------------------------------------------------- 1.3k Ω – ≈ (RRT to GND) R RT kΩ [] 55000 200 kHz [] F s kHz [] – ------------------------------------------------------- 70k Ω + ≈ (RRT to VCC) ISL6535 |
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